At a glance
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Skeletal Muscle Atrophy and Dysfunction Following Total Knee Arthroplasty
In Brief
A clinical study evaluating Neuromuscular electrical stimulation for Knee Osteoarthristis. Completed, enrolled 23 participants across 1 site.
Detailed Summary
Total knee replacement, or arthroplasty, is the final clinical intervention available to relieve pain and functional limitations related to advanced stage knee osteoarthritis. Despite its beneficial effects, the early post-surgical period is characterized by the erosion of lower extremity muscle size and strength that cause further disability and slow functional recovery. While the detrimental effects of this period on muscle are widely recognized, the mechanisms underlying these adaptations are poorly understood and there are currently no widely-accepted clinical interventions to counter them
Study Details
Timeline
Interventions
NMES will be conducted on the quadriceps of the operative leg using a portable stimulation device, starting within 48-72 hrs of surgery. The operative leg will be immobilized at a neutral angle (\~30º), with electrodes affixed to the anterior surface of the thigh. Symmetrical, biphasic pulses (400 µs duration at 50 Hz) will be used, with a duty cycle of 25% (10 s on, 30 s off), with patient-selected stimulation intensity to cause visible contractions below pain threshold. NMES sessions will occur 5 d/week, twice daily for 45 min (5 min warm-up) for 5 wks.